Across
- 1. The innermost layer.
- 4. Are scales with comb-like edge found in higher order teleost fishes, such as perch and sunfish.
- 6. Are slender keratinous filaments.
- 8. The tissue lining blood and lymph vessels is called.
- 13. Yolk platelets collect in the ovum to produce a macrolecithal egg.
- 16. It also contains most of the hair's pigment, giving the hair its color.
- 17. Are formed of closely adjoined cells with very little extracellular matrix between them.
- 18. Is a general coating of the body beneath the skin, made up of loose areolar tissue with varying amounts of fat.
- 20. The thick layer of living tissue below the epidermis which forms the true skin, containing blood capillaries, nerve endings, sweat glands, hair follicles, and other structures.
- 21. Is nearest to the uterine cavity and contains the lining cells and the necks of the uterine glands; its stroma is relatively dense.
- 24. Also called the cell membrane.
- 26. Is a patch of featherless skin that is visible on the underside of birds during the nesting season.
- 28. Informally known as the preen gland or the oil gland, is a bilobed sebaceous gland possessed by the majority of birds.
- 32. The outermost layer of cells or tissue of an embryo in early development.
- 33. The process by which the three germ tissue layers of the embryo.
- 34. Lies between the dermis and underlying tissues and organs.
- 37. Are covered with highly reflective scales which function as small mirrors and give the appearance of silvered glass.
- 38. Also known as bronchiolar exocrine cells.
- 39. Composed of more than one layer of cells.
- 40. Division of cells in the early embryo.
Down
- 2. The surface epithelium of the skin, overlying the dermis.
- 3. They are specialized smooth muscle cells mainly in the walls of the afferent arterioles (and some in the efferent arterioles) that deliver blood to the glomerulus.
- 5. Pores are a part of a holocrine secretory gland found on the inside of the thighs of certain lizards and amphisbaenians which releases pheromones to attract mates or mark territory.
- 7. Also called lancelet.
- 9. Use the merocrine method of secretion, secreting vesicles into a duct, but may use apocrine methods, budding off their secretions, when under stress.
- 10. The blastocyst is composed of a single layer of protodermal cells spread around the inside wall of the zona pellucida.
- 11. Is a thin, fibrous, extracellular matrix that separates the lining of an internal or external body surface from underlying connective tissue in metazoans.
- 12. The fusion of haploid gametes, egg and sperm, to form the diploid zygote.
- 14. Is a layer of extracellular matrix secreted by the epithelial cells, on which the epithelium sits.
- 15. The middle layer.
- 19. Is the inside space of a tubular structure, such as an artery or intestine.
- 22. Lines the surface of the body wall and abdominal organs.
- 23. Are smooth-edged scales predominately found in lower order teleost fishes, such as salmon, carp and other soft fin rayed fish.
- 25. Are small vertebrates that need water.
- 27. The differentiation of cells into specialized tissues and organs during growth.
- 29. Also known as interstitial cells.
- 30. Are usually rhomboid in shape and have articulating peg and socket joints between them.
- 31. The innermost layer of the epidermis, and contains small round cells called.
- 35. Is the study of relationships among different groups of organisms and their evolutionary development.
- 36. Is the area of the skin of the human anatomy that is mainly supplied by branches of a single spinal sensory nerve root.